The `@angular/language-service` package was not needed for integration tests or benchmarks. Removing this dependency simplifies the build configuration.
PR Close#64306
This commit removes Yarn as a package manager for integration tests and migrates to pnpm. This change aims to standardize package management across the project, leveraging pnpm's efficiency and consistent behavior for dependency resolution and installation.
PR Close#63902
Kristiyan Kostadinov